Welcome to EnviroDIY, a community for do-it-yourself environmental science and monitoring. EnviroDIY is part of Home › Forums › Environmental Sensors › inconsistent Results › Reply To: inconsistent Results
2017-04-30 at 5:09 PM
#2191
Hello Hicks,
Thanks for the reply, the sensors are buried completely in the soil as for the length i did not really measure that. Please see the attached file for the complete sketch running on the Arduino, and let me know what you think.
|
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 |
/*This is the first code for taking data from the 5TM sensor and showing it on the Arduino serial mornitor //The data is collected from the SDI12 sensor and timestamped then stored onto an SD card */ #include <SDI12.h> #include <SPI.h> #include <SD.h> #include <Wire.h> #include "RTClib.h" #define ECHO_TO_SERIAL 1 // echo data to serial port #define WAIT_TO_START 0 // Wait for serial input in setup() #define SYNC_INTERVAL 60000 // mills between calls to flush() - to write data to the card uint32_t syncTime = 0; // time of last sync() #define DATAPIN 5 // change to the proper pin for sdi-12 data pin, I prefer D7 SDI12 mySDI12(DATAPIN); //Define the number of sensors connected RTC_PCF8523 RTC; // define the Real Time Clock object //the digitalpins that connect to the LEDS #define redLEDpin 2 #define greenLEDpin 3 unsigned long previousMillis = 0; const long interval = 60000; //set the interval (in milliseconds). ex: 60000 = 60 seconds // for the data logging shield, we use digital pin 10 for the SD cs line const int chipSelect = 10; // the logging file File logfile; //Function for handling errors that occur void error(char *str) { Serial.print("error: "); Serial.println(str); // red LED indicates error digitalWrite(redLEDpin, HIGH); while(1); } //Function for the working with the real time clock //and time stamping the data collected from the sensors void timestamp(){ // fetch the time DateTime now = RTC.now(); // log time //logfile.print(now.unixtime()); // seconds since 1/1/1970 logfile.print(", "); logfile.print('"'); logfile.print(now.year(), DEC); logfile.print("/"); logfile.print(now.month(), DEC); logfile.print("/"); logfile.print(now.day(), DEC); logfile.print(" "); logfile.print(now.hour(), DEC); logfile.print(":"); logfile.print(now.minute(), DEC); logfile.print(":"); logfile.print(now.second(), DEC); logfile.print('"'); #if ECHO_TO_SERIAL //Serial.print(now.unixtime()); // seconds since 1/1/1970 Serial.print(", "); Serial.print('"'); Serial.print(now.year(), DEC); Serial.print("/"); Serial.print(now.month(), DEC); Serial.print("/"); Serial.print(now.day(), DEC); Serial.print(" "); Serial.print(now.hour(), DEC); Serial.print(":"); Serial.print(now.minute(), DEC); Serial.print(":"); Serial.print(now.second(), DEC); Serial.print('"'); #endif //ECHO_TO_SERIAL } //Function that runs at the start of the program once void setup () { //Debugging leds Serial.begin(57600); mySDI12.begin(); pinMode(greenLEDpin, OUTPUT); pinMode(redLEDpin, OUTPUT); #if WAIT_TO_START Serial.println("Type any character to start"); while (!Serial.available()); #endif //WAIT_TO_START // initialize the SD card Serial.print("Initializing SD card..."); // make sure that the default chip select pin is set to // output, even if you don't use it: pinMode(10, OUTPUT); // see if the card is present and can be initialized: if (!SD.begin(chipSelect)) { error("Card failed, or not present"); } Serial.println("card initialized."); // create a new file char filename[] = "LOGGER00.CSV"; for (uint8_t i = 0; i < 100; i++) { filename[6] = i/10 + '0'; filename[7] = i%10 + '0'; if (! SD.exists(filename)) { // only open a new file if it doesn't exist logfile = SD.open(filename, FILE_WRITE); break; // leave the loop! } } if (! logfile) { error("couldnt create file"); } Serial.print("Logging to: "); Serial.println(filename); // connect to RTC Wire.begin(); if (!RTC.begin()) { logfile.println("RTC failed"); #if ECHO_TO_SERIAL Serial.println("RTC failed"); #endif //ECHO_TO_SERIAL } digitalWrite(greenLEDpin, LOW); //turn off the onboard LED to start with logfile.println("Sketch for sampling multiple SDI12 sensors"); logfile.print(", ,"); for(int i=0; i<=2; i++){ logfile.print(" Sensor_Num, Ea, VWC(%), Temp(degC) "); logfile.print(","); } logfile.println(); #if ECHO_TO_SERIAL Serial.println("Sketch for sampling multiple SDI12 sensors"); for(int i=0; i<=2; i++){ Serial.print(" Sensor_Num, Ea, VWC(%), Temp(degC) "); } #endif//ECHO_TO_SERIAL Serial.println(); delay(1000); } void loop () { //unsigned long currentMillis = millis(); uint32_t currentMillis = millis(); if(currentMillis - previousMillis >= interval || previousMillis == 0) { previousMillis = currentMillis; digitalWrite(greenLEDpin, HIGH); //turn on the onboard LED to show that samples are being taken Serial.print("Time: "); Serial.print(currentMillis/1000); //print out the current time, in seconds logfile.print(currentMillis/1000); Serial.print("-----"); timestamp(); for (char j = '1'; j <= '3'; j++) { //go through channels 1 to 6 tmMeasurement(j); } logfile.println(); Serial.println(); digitalWrite(greenLEDpin, LOW); //turn off the LED to show that samples are done // Now we write data to disk! Don't sync too often - requires 2048 bytes of I/O to SD card // which uses a bunch of power and takes time if ((millis() - syncTime) < SYNC_INTERVAL) return; syncTime = millis(); // blink LED to show we are syncing data to the card & updating FAT! digitalWrite(redLEDpin, HIGH); logfile.flush(); digitalWrite(redLEDpin, LOW); } delay(1000); } void tmMeasurement(char c){ //5TM soil moisture sensor String command = ""; float Ea = 0.0; float temp = 0.0; float VWC = 0.0; command += c; command += "M!"; // SDI-12 measurement command format [address]['M'][!] mySDI12.sendCommand(command); delay(500); // wait a sec mySDI12.flush(); command = ""; command += c; command += "D0!"; // SDI-12 command to get data [address][D][dataOption][!] mySDI12.sendCommand(command); delay(500); if(mySDI12.available() > 0){ int channel = mySDI12.parseInt(); Ea = mySDI12.parseFloat(); temp = mySDI12.parseFloat(); VWC = (4.3e-6*(Ea*Ea*Ea)) - (5.5e-4*(Ea*Ea)) + (2.92e-2 * Ea) - 5.3e-2 ; //the TOPP equation used to calculate VWC //Serial.print("Sensor:"); //logfile.print(","); logfile.print(","); logfile.print(channel); logfile.print(","); //Serial.print(": Ea="); logfile.print(Ea); //apparent dielectric permittivity logfile.print(","); //Serial.print(", VWC="); logfile.print(VWC); //volumetric water content logfile.print(","); //Serial.print("%, Temp="); logfile.print(temp); //Tempeerature //logfile.print("degC .... "); #if ECHO_TO_SERIAL //Serial.print("Sensor:"); Serial.print(","); Serial.print(channel); Serial.print(","); //Serial.print(": Ea="); Serial.print(Ea); //apparent dielectric permittivity Serial.print(","); //Serial.print(", VWC="); Serial.print(VWC); //volumetric water content Serial.print(","); //Serial.print("%, Temp="); Serial.print(temp); //Tempeerature Serial.print(".... "); #endif } mySDI12.flush(); } |
Thanks
